You may have tried this already, but I'd check out his client side cache file...I've seen lot's of situations where that gets corrupt or outdated and really messes things up..you might try taking him...

I've seen situations where the only way you can get a device to activate is to remove it from bes and add it back.....don't know why exactly.....these devices have followed the pattern you describe,...

I'm not sure about how Sprint handles warranty service, but Verizon gives a 1 year warranty, and they normally handle replacement themselves, rather than directing you to RIM. I can't say, of course...

In addition there are some articles in the kbase about memory cleaning loading the processor to the extent that the phones can't decrypt texts fast enough..so you end up getting a <content protection...

As Motorocycle Mama said, that means bad battery...just one additional step; be sure your charger/cable is not messed up. The battery itself could be good, but the charging system might have failed....

Not to try and encourage you to circumvent a policy :)...a while back we looked at storage card encryption and found that it was file and folder based...so media files in only their default location...